Epimechus Dietz (Coleoptera: Curculionidae: Anthonomini)

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110 lowly sulcate; distal portion glabrous. Antenna: funiculus with 6 segments. Prothorax: pronotum with rounded scales; broad, cinereous, slightly imbricated scales predominant medially and laterally on dorsum, replaced on anterolateral portions of dorsum by slightly narrower, slightly infuscate scales; fuscous scales also present on pleuron. Elytra: narrow, slightly widened posteriorly, rounded apically; striae narrow, punctures with minute, inconspicuous setae; interstriae with rounded, slightly to broadly imbricated, multiseriate, recumbent scales; some interstria also with a few narrower, darker scales; pallid scales dense basally on sutural interstriae and inters tria 6 and on longer median and posteromedian portions of interstria 4, variously interspersed elsewhere among slightly darker infuscate scales; sutural inter striae slightly prominent, especially at apices. Pygidium: with slender, cinereous scales. Abdomen: sterna 1-4 with dense, imbricated, pallid scales laterally, with narrower scales medially; sternum 5 convex, with elongate, setiform scales medially. Legs (Fig. 29): profemur minutely toothed; protibia with inner margin prominent in basal 112, concave in apical 1/2; protibial uncus slender; metatibia of male with inner margin prominent in basal 1/2, broadly concave in apical 11 2, outer margin straight; metatibial mucro straight, oblique in lateral view, excavated; metatibia of female with inner margin slightly prominent in basal 2/3, slightly concave in apical 113, outer margin straight; metatibial mucro slender, curved, acute, oblique. Genitalia (Fig. 42): median lobe of aedeagus broad, narrowed to bluntly rounded apex in dorsal view, broadly, evenly curved in lateral view; endophallus unarmed. Specimens examined. In addition to the lectotype and paralectotype from Nevada, 92 specimens of E. nevadicus from the following localities were examined. United States. California. Alpine Co.: 10 mi. SE Markleeville (2, CWOB). 1nyo Co.: 1 mi. W Tom's Place (1, CWOB). Lassen Co.: 37 km. N Susanville (1, CASC). Mono Co.: 37 mi. N Bishop (1, CISC); 7.5 mi. W Bridgeport (6900',1, CWOB); 6 mi. W Lee Yinimo (1, CWOB). Shasta Co.: Lassen Park (2, MCZC); Old Station (13, CWOB). Siskiyou Co.: Lava Beds National Monument (5, AMNH); Mc Cloud (4200', "Haplopappus bloomeri", 96, CWOB); 30 mi. N Weed (28, CWOB). Nevada. Storey Co.: Geiger Summit (2, CDAE). Washoe Co.: Reno (1, MCZC). White Pine Co.: Snake Range, Wheeler Peak Trail (1, CDAE). Oregon. Deschutes Co.: 8 mi. W Bend (3, AMNH). Jackson Co.: Siskiyou (1, Volume 15, No.2, June, 2001, INSECTA MUNDI OSUO). Klamath Co.: 8 mi. S Chemult ("sweeping Eriogonum", 1, AMNH); Fort Klamath (7, AMNH); 5 mi. N Fort Klamath (5, OSUO); Klamath Falls (2, AMNH); 8 mi. N Klamath Falls ("sweeping rabbit brush", 1, TAMU); Pothole ("Haplopappus", 12, AMNH; 1, OSUO). Plant associations. Label data indicate that some adults of E. nevadicus were collected on Haplopappus bloomeri A. Gray and "rabbit brush" (Asteraceae). Remarks. Like E. mobilis, E. nevadicus is distinguished from E. adspersus by the denser vestiture of broader scales. In addition, E. nevadicus is broader and stouter in body form and has the median lobe of the aedeagus broader than that in either of those two species(cf. Figs. 39, 40, 42). The rostrum is stouter and more densely punctate in E. nevadicus than in E. mobilis and E. adspersus. Epimechus nevadicus appears to be widely distributed on the eastern slope of the Sierra Nevada into the Great Basin region, whereas E. mobilis and E. adspersus are known only from southern California west of the Sierra Nevada. Epimechus combustus, new species Figs. 15, 16, 30, 43 Type series. Holotype. United States. New Mexico. Catron Co.: [23 mi. E. Quemado,! Catron Co., N. Mex.!VIII-27-1965. H. R.! Burke & J. R. Meyer] (male, TAMU). Paratypes (49). United States. Arizona. [Ari.] [W. G. Dietz/ Coll.] (1 female, MCZC); [Ariz] (1 female, USNM); [Walnut/ Ariz.] [Anthonomus/ n.sp. 3/5 4/ Walnut A.T.] (1 male, USNM); [Walnut/ Ariz.] (1 female, USNM). Coconino Co.: [USA Arizona Coconino Co.! Moenkapi Dune Area/ 2.5 mi. S. Tuba City/ 4859' 20.VII.82/ R. S. Anderson] (8 males, 5 females, CMNC). New Mexico. [Wickham.! Luna, N. Mex] (1 female, USNM). Catron Co.: [23 mi. E. Quemado,! Catron Co., N. Mex.! VIII-27-1965. H. R.! Burke & J. R. Meyer] (5 males, 1 female, TAMU). Lincoln Co.: [N. MEXICO: Lincoln Col Sierra Blanca 11,600/ Alpine Aug. 19, 1970/ J. R. and M. H. Sweet] (1 female, CWOB). Socorro Co.: [NEWMEXICO:/SocorroCo.!lmi. w.Magdalena/ August 14, 1982/ J. C. Schaffner] (2 females, TAMU). Sandoval Co.: [Bandelier Natl.l Monument, NM/ June 23,1964/ H. R. Burke] (7 males, 3 females, TAMU). Utah. Garfield Co.: [Lonesome Beaver,! 7500' Henry Mts.,! Utah. VII-17-1968/ A. T. Howden] (1 female, HAHC); [Lonesome Beaver,!
INSECTA MUNDI, Vol. 15, No.2, June, 2001 7500' Henry Mts.,!Utah. VII-23-1968/ A. T. Howden] (2 males, 2 females, HAHC); [Lonesome Beaver,! 7500'Henry Mts.,!Utah. VII-25-1968/ A. T. Howden] (1 male, 1 female, HAHC). Kane Co.: [USA UTAH Kane Co.! 2 mi. E. Mt. Carmel/ Junction 16.V.83/ R. Anderson - sweep] (1 male, CMNC); [4 mi. SE Mt.! Carmel Jct.,! Kane Co. UTAH/ IX-1-1962 6500'] [C. W. O'Brien/ Collector] (4 females, CWOB). Description. Integument black, mostly concealed beneath broadly imbricated scales. Length.: 1.5- 2.9mm. Width: 0.8-1.0mm. Head: with dense, rounded scales on vertex, with broader, imbricated scales on frons and beneath. Rostrum: evenly curved; proximal portion rugose-punctate, with dense, imbricated scales at extreme base, otherwise glabrous; distal portion glabrous. Antenna: funiculus with 6 segments. Pro thorax: pronotum with broad, rounded, densely imbricated, cinereous scales; slightly narrower, infuscate scales present on anterolateral portions of dorsum and on pleuron. Elytra: not widened posteriorly, slightly extended apically in dorsal view, elevated and convex posteriorly in lateral view; sutural interstriae prominent in apical 1/3; striae narrow, punctures with minute, inconspicuous setae; interstriae with densely imbricated, rounded, recumbent, cinereous scales; slightly narrower, infuscate scales present in diffuse median rows. Pygidium: with slender, cinereous scales. Abdomen: sterna 1-4 with dense, imbricated, pallid scales laterally, with narrower scales medially; sternum 5 convex, with elongate, setiform scales medially. Legs (Fig. 30): profemur unarmed; protibia with inner margin slightly prominent medially; protibial uncus short, stout; metatibia of male straight on outer margin, with inner margin slightly sinuate; metatibial mucro short, nearly straight, extended obliquely to long axis of tibia in lateral view; metatibia offemale with inner margin slightly prominent in basal 2/3, slightly concave in apical 1/3, outer margin straight; metatibial mucro conical, curved, acute, oblique. Genitalia (Fig. 43): median lobe of aedeagus broad, slightly constricted subapically and broadly rounded apically in dorsal view; endophallus unarmed. Specimens examined. Epimechus combustus is known only from the type series. Plant associations. Unknown. Remarks. Epimechus combustus appears to replace E. nevadicus east ofthe Great Basin region in 111 Arizona, Utah, Colorado and New Mexico. It is distinguished from E. nevadicus by the denser, more broadly imbricated pronotal and elytral vestiture (cf. Figs. 13-16), the narrower, more shallowly punctate, smoother, more shining rostrum (cf. Figs. 13, 15) and the subparallel-sided rather than posteriorly widened elytra (cf. Figs. 14, 16). In addition, the median lobe of the aedeagus is slightly constricted subapically and broadly rounded at the apex in dorsal view in E. combustus (Fig. 43), whereas E. nevadicus has the apical portion of the median lobe of the aedeagus more gradually narrowed to a more narrowly rounded apex (Fig. 42). E. combustus exhibits variation in squamosity. Examined specimens from Arizona and New Mexico have dense, broadly imbricated scales, whereas the specimens from Utah have smaller, scarcely imbricated scales. The usual variation in the proportion of pallid to dark scales is also evident, but pallid scales are by far the most predominant. The name of this species, Latin for "burned up", is suggested by the name of the type locality, Spanish for "burned." Epimechus signum, new species Figs. 17, 18,31,44 Type series. Holotype. United States. Arizona. [ARIZ: Coconino/ Co., Flagstaff, 14/ mi. W. VIII-14- 63] [J. Doyen/ Collector] (male, CWOB). Paratypes (219). Canada. Saskatchewan. [CANADA, SASK, Wey-/ burn, 23 km E. ex/ sweeps 28 VI 1982/ 1. Askevold coIl.] (2 males, CMNC). Paratypes. United States. Arizona. Coconino Co.: 32 Mi. E. Cameron! Coconino Co. ARIZ.! VII-19-1957/ C. W. O'BRIEN] (2 males, 2 females, CWOB); [Flagstaff/ Ariz. 8/1/33] [Collector/ E. Maehler] [K L Maehler/ Collection] (1 male, CASC); [ARIZ: Coconino/ Co., Flagstaff, 14/ mi. W. VIII-14-63] [J. Doyen/ Collector] (48 males, 27 females, CWOB); [Ariz. 8 mi. E.! Flagstaff/ 6800' Coco.! Co. IX-9-1964] [Collectors: L&/ C. W. O'Brien] (7 males, 9 females, CWOB); [ARIZ. 11 mi.!E. Flagstaff/XI-2-1969/C. W. O'Brien] (1 male, CWO B); [5 mi. S. Flagstaff/ Coconino Co.! ARIZ. IX-5-1962/ C. W. O'Brien (3 males, 1 female, CWOB); [Ft. Valley, ARIZ.!Sept. 4, 1959/ W L/ Nutting] (1 female, UAIC); [Kaibab Lake N.! For. Cpo 7000'/ Ariz. Coconino/ Co. IX-7-1964] [Collectors: L&/ C. W. O'Brien] (3 males, 3 females, CWOB); [USA Ariz. Coconino/ Co., Coconino Nat. For., 2 km. w. Sunset/ Crater Nat. Mon.! 2100 m. 23-24.VII.! 1982 J. E. O'Hara (1 male, 1 female, CMNC); [Williams/ Ari/ July 3-5'04] [H. C. FALL/ COLLEC-
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Epimechus Dietz (Coleoptera: Curculionidae: Anthonomini)

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